<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<div id="app">
  <h2 v-if="score>90">优秀</h2>
  <h2 v-else-if="score>80">良好</h2>
  <h2 v-else-if="score>60">偏差</h2>
  <h2 v-else>不及格</h2>
</div>
  <script src="../../project_practice/lunbotu/vue.js"></script>
  <script>
    const app = new Vue({
      el:'#app',
      data:{
        message:"你好啊！！",
        score:55
      }
    })
  </script>
</body>
</html>